When one is utterly drenched in sweat, and subsequently lies on a porous surface (such as a wooden deck) for a substantial amount of time. The resulting outline of a human figure resembles a snow angel, but instead of being an imprint in snow, is of dark mark made of sweat.

So I went for a 94 minute run, and it was like 94 degrees out. When I got home, I laid down on my deck and made an AWESOME Jamaican snow angel.